REMKO RT 080 User manual

OPERATORS MANUAL
Installation, Operation,
Maintenance and Parts List.
RT 080

TABLE OF CONTENTS
INTRODUCTION.................................................................................
SECTION A – SAFETY.......................................................................
SECTION B – INSTALLATION...........................................................
Pump Dimensions.............................................................
1. PREINSTALLATION INSPECTION...........................................
2. POSITIONING PUMP................................................................
Lifting.................................................................................
Mounting...........................................................................
Clearance..........................................................................
3. SUCTION AND DISCHARGE PIPING......................................
Materials............................................................................
Line Configuration.............................................................
Connections to Pump........................................................
Gauges..............................................................................
4. SUCTION LINES.......................................................................
Fittings...............................................................................
Strainers............................................................................
Sealing..............................................................................
Suction Lines in Sumps.....................................................
Suction Lines Positioning..................................................
5. DISCHARGE LINES..................................................................
Siphoning..........................................................................
Valves...............................................................................
Bypass Lines.....................................................................
6. AUTOMATICAIR RELEASE VALVE.........................................
Theory of Operation..........................................................
Air Release Valve Installation............................................
7. ALIGNMENT..............................................................................
Coupled Drivers................................................................
V-Belt Drives.....................................................................
SECTION C – OPERATION................................................................
8. PRIMING...................................................................................
9. STARTING................................................................................
Rotation.............................................................................
10. OPERATION...........................................................................
Lines With a Bypass..........................................................
Lines Without a Bypass.....................................................
Leakage............................................................................
Liquids Temperature and Overheating..............................
Strainer Check..................................................................
Pump Vacuum Check.......................................................
11. STOPPING..............................................................................
Cold Weather Preservation...............................................
12. BEARING TEMPERATURE CHECK......................................
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1

2
TABLE OF CONTENTS
(Continued)
SECTION D – TROUBLESHOOTING.……….............………………..
SECTION E – PUMP MAINTENANCE AND REPAIR………..............
13. PERFORMANCE CURVE…………………………… ……….…
Pump Model ………………………………………………....
PARTS LISTS ........................................................................
Repair Rotating Assembly…………………………………..
REPAIR AND MAINTENANCE KITS…..................................
PARTS LISTS .........................................................................
Back Cover and Wear Plate Removal……………….....….
Suction Check Valve Removal……………………………..
Rotating Assembly Removal………………………………..
Impeller Removal…………………………………………….
Seal Removal……………………………………………...…
Shaft and Bearing Removal and Disassembly……………
Shaft and Bearing Reassembly and Installation………….
Seal and Installation…………………………......................
Impeller Installation……………………………………….….
Rotating Assembly Installation……….…………………..…
Suction Check Valve Installation…………………………...
Back Cover Installation……………………………………...
15. PRESSURE RELIEF VALVE MAINTENANCE......................
Final Pump Assembly........................................................
16. LUBRICATION........................................................................
Seal Assembly...................................................................
Bearings............................................................................
Power Source....................................................................
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Pg. 18
SECTION F – WARRANTY..................……….............……………….. Pg. 38
PLEASE NOTE: Specifications, measurements and other technical
data contained in this manual is subject to change without notice.
14. PUMPAND SEAL DISASSEMBLYAND REASSEMBLY….... Pg. 26
NOTES .................................................................................. Pg. 37

INTRODUCTION
3
This Installation, Operation, and Maintenance manual is designed to help you get the
bestperformanceandlongestlifefromyourRemko pump.
ThispumpisaRT080 Series,semi-openimpeller, self priming centrifugal model with
asuctioncheckvalve.
The pump is designed for handling mild industrial corrosives, mud or slurries
containing large entrained solids. The basic material of construction is cast iron, with
ductileironimpellerandsteelwearingparts.
Ifthereareanyquestionsregardingthepumporitsapplicationswhicharenotcovered
inthismanualorin otherliteratureaccompanyingthisunit, pleasecontactyourRemko
distributor.
Forinformation ortechnicalassistanceonthepowersource,contactthepowersource
manufacture'slocaldealerorrepresentative.
The following are used to alert maintenance personnel to procedures which require
special attention, to those which could damage equipment, and to those which could
bedangeroustopersonnel:
NOTE: Instructions to aid in installation, operation, and maintenance or which
clarifyaprocedure.
Hazards or unsafe practices which COULD result in minor personal
injury or product or property damage. These instructions describe
the requirements and the possible damage which could result from
failuretofollowtheprocedure.
CAUTION!
Immediate hazards which WILL result in severe personal injury or
death. These instructions describe the procedure required and the
injurywhichwillresultfromfailuretofollowprocedure.
DANGER!

SECTION A SAFETY-
These warnings apply to RT series basic pumps. Remko has no control over or
particular knowledge of the power source which will be used. Refer to the manual
accompanyingthepowersourcebeforeattemptingtobeginoperation.
4
This pump is designed to handle mild industrial corrosives, mud or
slurries containing large entrained solids. Do not attempt to pump
volatile, corrosive, or flammable materials which may damage the
pumporendangerpersonnelasresultofpumpfailure.
WARNING!
Afterthepumphasbeen positioned,makecertain thatthepump and
all piping connections are tight, properly supported and secure
beforeoperation.
Do not operate the pump without the guards in place over the
rotatingparts.
Exposedrotatingpartscancatch clothing,fingers, ortools,causing
severeinjurytopersonnel.
Use lifting and moving equipment in good repair and with
adequate capacity to prevent injuries to personnel or damage to
equipment. Suction and discharge hoses and piping must be
removedbeforelifting.
Donotremoveplates,covers, gauges,pipeplugs, orfittingsfrom an
overheatedpump.Vapourpressurewithinthepumpcancauseparts
being disengaged to be ejected with great force. Allow the pump to
coolbeforeservicing.
Donotoperatethepumpagainstacloseddischargevalveforlong
periods of time. If operated against a closed discharge valve,
pump components will deteriorate, and the liquid could come to a
boil,pressure,andcausethepumpcasingtoruptureorexplode.
WARNING!
WARNING!
WARNING!
WARNING!
WARNING!
WARNING!
Before attempting to open or service the pump:
1. Familiarize yourself with this manual.
2. Disconnect or lock out the power source to ensure that the
pump will remain inoperative.
3. Allow the pump to cool if overheated.
4. Check the temperature before opening any covers, plates, or plugs.
5. Close the suction and discharge valves.
6. Vent the pump slowly and cautiously.
7. Drain the pump

SECTION B – INSTALLATION
OUTLINE DRAWING
5
ReviewallSAFETYinformationinSectionA.
Since pump installations are seldom identical, this section offers only general
recommendations and practices required to inspect, position and arrange the pump
andpiping.
Mostoftheinformationpertainstoastandardstatic liftapplicationwherethepumpis
positionedabovethelevelofliquidtobepumped.
If installed in a flooded suction application where the liquid is supplied to the pump
under pressure, some of the information such as mounting, line configuration, and
primingmustbetailoredtothespecificapplication.
Since the pressure supplied to the pump is critical to performance and safety, be sure
to limit incoming pressure to 50% of the maximum permissible operating pressure as
shownonthepumpperformancecurve.
Forfurtherassistance,contactyourRemkodistributor.
PumpDimensions
SeeFigure1belowfortheapproximatephysicaldimensionsofthispump.
Figure 1. Pump Model RT 080
DIMENSIONS: MILLIMETRES
Ø17.5
293.7
76.2
228.6 284.2
668.3
190.5
70
687.4
431.8
393.7
431.8
101.6
Ø38.1
80MM ANSI 150
80MM ANSI 150

6
1. PREINSTALLATION INSPECTION
The pump assembly was inspected and tested before from the factory. Before
installation, inspect the pump for damage which may have occurred during shipment.
Checkasfollows:
a. Inspect the pump for cracks, dents, damaged threads, and other obvious
damage.
b. Check for and tighten loose attaching hardware. Since gaskets tend to shrink
afterdrying,checkforloosehardwareatmatingsurfaces.
c. Carefully read all warnings and cautions contained in this manual or affixed to
the pump, and perform all duties indicated. Note the direction of rotation
indicated on the pump. Check that the pump shaft rotates counterclockwise
whenfacingthebackcoverplateassembly/impellerendofthepump.
2. POSITIONING PUMP
Lifting
Use lifting equipment with a capacity of at least 900kg. This pump weighs
approximately 190kg, not including the weight of accessories and base. Customer
installed equipment such as suction and discharge piping must be removed before
attemptingtolift.
The pump assembly can be seriously damaged if the cables or
chains used to lift and move the unit is improperly wrapped around
thepump.
CAUTION!
Mounting
Locate the pump in an accessible place as close as practical to the liquid being
pumped.Levelmountingisessentialforproperoperation.
The pump may have to be supported or shimmed to provide for level operation or to
eliminatevibration.
Clearance
When positioning the pump, ensure clearances of 500 mm at both the back cover and
rotatingassembly,allowingeasyaccesstothepumpinterior.
Only operate this pump in the direction indicate by the arrow on the
pump body and on the accompanying decal. Refer to ROTATION in
OPERATION,SectionC.
CAUTION!
a. Check levels and lubricate as necessary. Refer to LUBRICATION in the
MAINTENANCE AND REPAIR section of this manual and perform duties as
instructed.
b. Ifthepumpandpowersourcehavebeenstoredformorethan12months,some
of the components or lubricants may have exceeded their maximum shelf life.
Thesemustbeinspectedorreplacedtoensuremaximumpumpservice.
c. If the maximum shelf life has been exceeded, or if anything appears to be
abnormal,contactyour Remkodistributoror thefactoryto determinetherepair
orupdatingpolicy.Donotputthepumpintoserviceuntilappropriateactionhas
beentaken.

7
Pump performance is adversely affected by increase suction lift, discharge elevation.
Andfrictionlosses.SeetheperformancecurveandoperatingrangeshownonPage20
to be sure your overall application allows pump to operate within the safe operation
range.-Figure9.
Materials
Eitherpipeorhosemaybeusedforsuctionanddischargelines:however,thematerials
mustbecompatiblewithliquidbeingpumped.
If hose is used in suction lines, it must be the rigid-wall, reinforced type to prevent
collapseundersuction.Usingpipingcouplingsinsuctionlinesisnotrecommended.
LineConfiguration
Keep suction and discharge lines as straight as possible to minimize friction losses.
Make minimum use of elbows and fittings, which substantially increase friction loss. If
elbowsarenecessary,usethelongradiustypetominimizefrictionloss.
ConnectionstoPump
Before tightening a connecting flange, align it exactly with the pump port. Never pull a
pipelineintoplacebytighteningtheflangeboltsand/orcouplings.
Lines near the pump must be independently supported to avoid strain on the pump
whichcouldcauseexcessive vibration, decrease bearinglife,andincreasedshaft and
seal wear. If hose-type lines are used, they should have adequate support to secure
themwhenfilledwithliquidandunderpressure.
Gauges
Most pumps are drilled and tapped for installing discharge pressure and vacuum
suctiongauges.Ifthesegaugesaredesiredforpumpsthatarenottapped,drillandtap
the suction and discharge lines not less than 500mm from the suction and discharge
portsandinstallthelines.Installationclosertothepumpmayresultinerraticreadings.
Toavoidairpockets which couldaffectpump priming,thesuctionlinemust be asshort
and direct as possible. When operation involves a suction lift, the line must always
slopeupwardtothepumpfromthesourceoftheliquid beingpumped:if thelineslopes
downtothepumpatanypointalongthesuctionrun,airpocketswillbecreated.
Fittings
Suctionlinesshouldbethesamesizeasthepumpinlet.Ifreducersareusedinsuction
lines, they should be the eccentric type, and should be installed with the flat part of the
reducers uppermost to avoid creating air pockets. Valves are not normally used in
suctionlines,butifavalveisused,installitwiththehorizontaltoavoidairpockets.
Strainers
If a strainer is furnished with the pump, be certain to use it; any spherical solids which
passthroughastrainerfurnishedwiththepumpwillalsopassthroughthepumpitself.
If a strainer is not furnished with the pump, but is installed by the pump user, make
certainthatthetotalareaoftheopeningsinthestrainerisatleastthreeorfourtimesthe
crosssection ofthesuctionline,andthattheopeningswillnotpermitpassageofsolids
largerthanthesolidshandlingcapabilityofthepump.
Thispumpisdesignedtohandleupto63mmdiametersphericalsolids.
3. SUCTION AND DISCHARGE PIPING
4. SUCTION LINES

8
Sealing
Since even a slight leak will affect priming, head, and capacity, especially when
operating with a high suction lift; all connections in the suction line should be sealed
with pipe dope to ensure an airtight seal. Follow the sealant manufacturer's
recommendations when selecting and applying the pipe dope. The pipe dope should
becompatiblewiththeliquidbeingpumped.
SuctionLinesinSumps
If a single suction line is installed in a sump, it should be positioned away from the wall
ofthesumpatadistanceequalto1½timesthediameterofthesuctionline.
If there is a liquid flow from an open pipe into the sump, the flow should be kept away
from the suction inlet because the inflow will carry air down into the sump, and air
enteringthesuctionlinewillreducepumpefficiency.
If it is necessary to position inflow close to the suction inlet, install a baffle between the
inflow and the in suction lines, it must be the rigid-wall, reinforced type to prevent
collapse under suction. Using piping couplings in suction lines is not recommended.
Suction inlet at a distance 1 ½ times the diameter of the suction pipe. The baffle will
allowentrainedairtoescapefromtheliquidbeforeitisdrawnintothesuctioninlet.
Iftwosuctionlinesareinstalledasinglesump,theflowpathsmayinteract,reducingthe
efficiencyofoneorbothpumps.Toavoidthis,positionthesuctioninletssothattheyare
separatedbyadistanceequaltoatleast3timesthediameterofthesuctionpipe.
SuctionLinePositioning
The depth of submergence of the suction line is critical to efficient pump operation.
Figure2belowshowsrecommendedminimumsubmergencevs.velocity.
NOTE: The pipe submergence required may be reduced by installing a
standard pipe increaser fitting at the end of the suction line. The larger opening
size will reduce the inlet velocity. Calculate the required submergence using the
followingformulabasedontheincreasedopeningsize(areaordiameter).
VELOCITY (M./SEC.)= FLOW (M./MIN)x21.22 OR FLOW (M³/SEC.)
DIAMETER IN MM² AREA IN M²
Figure 2. Recommended Minimum Suction Line Submergence vs. Velocity
m
4.25
4.00
3.75
3.50
3.25
3.00
2.75
2.50
2.25
2.00
1.75
1.50
1.25
1.00
0.75
0.50
0.25
0.00
VELOCITY: Meters / Second
5.00
4.75
4.50
0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 m/sec

9
Siphoning
Do not terminate the discharge line at a level lower than of the liquid being pumped
unless a siphon breaker is used in the line. Otherwise, a siphoning action causing
damagetothepumpcouldresult.
VALVES
If a throttling valve is desired in the discharge line, use a valve as large as the largest
pipetominimizefrictionlosses.Neverinstallathrottlingvalveinasuctionline.
With high discharge heads, it is recommended that a throttling valve and a system
checkvalvebeinstalledinthedischargelinetoprotectthepumpfromexcessiveshock
pressureandreverserotationwhenitisstopped.
5. DISCHARGE LINES
If the application involves a high discharge head, gradually close the
dischargethrottlingvalvebeforestoppingthepump.
CAUTION!
BypassLines
Self-priming pumps are not air compressors. During the priming cycle, air from the
suctionlinemustbeventedtoatmosphereonthedischargeside.Ifthedischargelineis
open,thisairacheck valve has beeninstalledinthedischargeline, the discharge side
of the pump must be opened to atmospheric pressure through a bypass line installed
between the pump discharge an the check valve.A self-priming centrifugal pump will
not prime if there is sufficient static liquid head to hold the discharge check valve
closed.
NOTE: The bypass line should be sized so that it does not affect pump
discharge capacity; however, the bypass line should be at least 25mm in
diametertominimizethechanceof plugging.
In low discharge head applications (less than 9 meters), it is recommended that the
bypassline berunbacktothewetwell,andlocate150mmbelow thewaterlevelorcut-
off point of the level pump. In some installations, this bypass line may be terminated
with a 1800-2400mm length of 32mm ID. Smooth-bore hose; air and liquid vented
during the priming process will then agitate the hose and break up any solids, grease,
orothersubstanceslikelytocauseclogging.
A bypass line that is returned to a wet well must be secured against
beingdrawnintothepumpsuctioninlet.
CAUTION!
Itisalsorecommendedthat pipeunionsbeinstalledateach90ºelbow inabypassline
toeasedisassemblyandmaintenance.
In high discharge head applications (more than 9 metres), an excessive amount of
liquidmaybebypassedandforcedbacktothewetwellunderthefullworkingpressure
of the pump; this will reduce overall pumping efficiency. Therefore, it is
recommended that an Automatic Air Release Valve be installed in the bypass
line.
Automatic Air Release Valves are reliable, and require minimum maintenance. See
AUTOMATIC AIR RELEASE VALVE in this section for installation and theory of
operation of the Automatic Air Release Valve. Contact your Remko distributor for
selectionofan AutomaticAirReleaseValvetofityourapplication.

10
Allow an over-heated pump to cool before servicing. Do not remove plates,
covers, gauges, or fittings from an overheated pump. Liquid within the pump
canreachboilingtemperatures,andvapourpressurewithinthepumpcancause
parts being disengaged to be ejected with great force. After the pump cools,
drain the liquid from the pump by removing the casing drain plug. Use caution
whenremovingtheplugtopreventinjurytopersonnelfromhotliquid.
If the installation involves a flooded suction such as below-ground lift station. A pipe
unionandmanualshut-offvalvemaybeinstalledinthebleedlinetoallowserviceofthe
valve without shutting down the station, and to eliminate the possibility of flooding. If a
manual shut-off valve is installed anywhere in the air release piping, it must be a full-
openingballtypevalvetopreventpluggingbysolids.
If a manual shut-off valve is installed in a bypass line, it must not be
left closed during operation. A closed manual shut-off valve may
cause a pump which has lost prime to continue to operate without
reaching prime, causing dangerous overheating and possible
explosive rupture of the pump casing. Personnel could be severely
injured.
DANGER!
When properly installed and correctly adjusted to the specific hydraulic operating
conditionsoftheapplication,the AutomaticAir Release Valve will permit airtoescape
through the bypass line, and then close automatically when the pump is fully primed
andpumpingatfullcapacity.
TheoryofOperation
Figures3and4belowshowacross-sectionalviewoftheAutomaticAir ReleaseValve,
andacorrespondingdescriptionofoperation.
6. AUTOMATIC AIR RELEASE VALVE
During the priming cycle, air from the pump casing flows through the bypass line, and
passesthroughtheAirReleasevalvetothewetwell(Figure3).
When the pump is fully primed, pressure resulting from flow against the valve
diaphragm compresses the spring and closes the valve (Figure 4). The valve will
remain closed, reducing the bypass of liquid to 3.8 to 19 litres per minute, until the
pumplosesit'sprimeorstops.
Figure 3. Valve in Open Position Figure 4. Valve in Closed Position

11
When the pump shuts down, the spring returns the diaphragm to its original position.
Any solids that may have accumulated in the diaphragm chamber settle to the bottom
andareflushedoutduringthenextprimingcycle.
NOTE: The valve will remain open if the pump does not reach its designed
capacity or head. Valve closing pressure is dependent upon the discharge head
of the pump at full capacity. The range of the valve closing pressure is
established by the tension rate of the spring as ordered from the factory. Valve
closing pressure can be further adjusted to the exact system requirements by
moving the spring retaining pin up or down the plunger rod to increase or
decrease tension on the spring. Contact your Remko distributor for information
aboutanAutomaticAirReleaseValveforyourspecificapplication.
AirReleaseValveinstallation
The Automatic Air Release Valve must be independently mounted in a horizontal
position and connected to the discharge line of the self-priming centrifugal pump (see
Figure5below).
NOTE: If the Air Release Valve is to be installed on a staged pump application,
contactthefactoryforspecificinstallationinstructions.
Some leakage 3.8 to 19 litres per minute will occur when the valve is
fully closed. Be sure the bypass line is directed back to the wet well
ortanktopreventhazardousspills.
WARNING!
Figure 5. Typical Automatic Air Release Valve Installation
SUCTION
LINE
WET WELL OR SUMP
BLEED LINE
25MM DIA. MIN.
(CUSTOMER
FURNISHED)
EXTEND
152MM
BELOW LIQUID
LEVEL SURFACE
90° LONG
RADIUS
ELBOW
°
INSTALLAIR RELEASE VALVE
IN HORIZONTAL POSITION
CLEAN-OUT
COVER
DISCHARGE PIPE
DISCHARGE PIPE
SUPPORT
BRACKET SELF-PRINING
CENTRIFUGAL
PUMP
DRAIN LINE

12
The valve inlet must be installed between the pump discharge port and the non-
pressurized side of the discharge check valve. The valve inlet is it at the large end of
thevalvebody,andisprovidedwithstandard25mmNPTpipethreads.
The valve outlet is located at the opposite end of the valve, and is also equipped with
standard 25mm NPT pipe threads. The outlet should be connected to a bleed line
whichslopes backtothewetwellorsump.Thebleedlinemustbethesamesizeasthe
inlet piping, or larger. If piping is used for the bleed line, avoid the use of elbows
wheneverpossible.
NOTE: It is recommended that each Air Release Valve be fitted with an
independent bleeder line directed back to the wet well. However, if multiple airs
Release Valves are installed in a system, the bleeder lines may be directed to a
common manifold pipe. Contact your Remko distributor for information about
installationofanAutomaticAirReleaseValveforyourspecificapplication.
The alignment of the pump and its power source is critical for trouble-free mechanical
operation. In either a flexible coupling or V-belt driven system, the driver and pump
must be mounted so that their shafts are aligned with and parallel to each other. It is
imperative that alignment be checked after the pump and piping are installed, and
beforeoperation.
NOTE: CheckRotation,SectionC,beforealignmentofthepump.
When mounted at the Remko factory, driver and pump are aligned before shipment.
Misalignment will occur in transit and handling. Pumps must be checking alignment,
tighten the foundation bolts. The pump casing feet and/or pedestal feet, and the driver
mountingboltsshouldalsobetightlysecured.
7. ALIGNMENT
When checking alignment, disconnect the power source to ensure that
thepumpwillremaininoperative.
WARNING!
Adjusting the alignment in one direction may alter the alignment in
anotherdirection.Checkeachprocedureafteralteringalignment.
CAUTION!
Coupled Drives
When using couplings, the axis of the power source must be aligned the axis of the
pumpshaftin boththehorizontal andverticalplanes.Most couplingsrequirea specific
gap or clearance between the driving and the driven shafts. Refer to the coupling
manufacturer'sserviceliterature.
Align spider insert type couplings by using calipers to measure the dimensions on the
circumference of the outer ends of the coupling hub every 90 degrees. The coupling is
inalignmentwhenthehubends are the same distanceapartatallpoints(seeFigure 6
page13).

13
Align non-spider type couplings by using a feeler gauge or taper gauge between the
couplingshalvesevery90degrees.Thecouplingisinalignmentwhenthehubsarethe
samedistanceapartatallpoints(seeFigure7above).
Checkparallel adjustmentby layinga straightedgeacross bothcoupling rimsat thetop,
bottom,andside.Whenthestraightedgerests evenlyonboth halvesofthe coupling,the
coupling is in horizontal parallel alignment. If the coupling is misaligned use a feeler
gauge between the coupling and the straightedge to measure the amount of
misalignment.
V-BeltDrives
When using V-belt drives, the power source and the pump must be parallel. Use a
straightedge along the sides of the pulleys to ensure that the pulleys are properly
aligned (see Figure 8 below). In drive systems using two pr more belts, make certain
thatthebeltsareamatchedset;unmatchedsetswillcauseacceleratedbeltwear.
Figure 6.Aligning Spider Type Couplings Figure 7. Aligning Non-Spider Type Couplings
MISALIGNED: SHAFTS
NOT PARALLEL MISALIGNED: SHAFTS NOT IN LINE ALIGNED: SHAFTS PARALLEL AND
SHEAVES IN LINE
Figure 8.Alignment of V-Belt Driven Pumps
Tightenthebeltsinaccordancewiththebeltmanufacturer'sinstructions.Ifthebeltsare
too loose, they will slip; if the belts are too tight, there will be excessive power loss and
possible bearing failure. Select pulleys that will match the proper speed ratio; over
speedingthepumpmaydamagebothpumpandpowersource.
Donot operatethepumpwithoutthe guardin placeover therotating
parts. Exposed rotating parts can catch clothing, fingers, or tools,
causingsevereinjurytopersonnel.
DANGER!

SECTION C – OPERATION
ReviewallSAFETYinformationinSectionA.
Followinstructionsonalltags,labelsanddecalsattachedtothepump.
Addliquidtothepumpcasingwhen:
1. Thepumpisbeingputintoserviceforthefirsttime.
2. Thepumphasnotbeenusedforaconsiderablelengthoftime.
3. Theliquidinthepumpcasinghasevaporated.
Oncethepumpcasinghasbeenfilled,thepumpwillprimeandreprimeasnecessary.
14
Install the pump and piping as describe in INSTALLATION. Make sure that the piping
connections are tight, and that the pump is securely mounted. Check that the pump is
properlylubricated(seeLUBRICATIONinMAINTENANCEANDREPAIR).
Thispumpisself-priming,butthepumpshouldneverbeoperatedunlessthereisliquid
inthepumpcasing.
8. PRIMING
This pump is designed to handle mild industrial corrosives, mud or
slurries containing large entrained solids. Do not attempt to pump
volatile; corrosive, or flammable liquids which may damage the
pumporendangerpersonnelasaresultofpumpfailure.
WARNING!
Pump speed and operating conditions must be within the
performancerangeshownonpage20-figure9.
CAUTION!
Never operate this pump unless there is liquid in the pump casing.
The pump will not prime when dry. Extend operation of a dry pump
willdestroythesealassembly.
CAUTION!
Afterfillingthepumpcasing,reinstallandtightenthefillplug.Donot
attempttooperatethepumpunlessallconnectingpipingissecurely
installed. Otherwise, liquid in the pump forced out under pressure
couldcauseinjurytopersonnel.
WARNING!
To fill the pump, remove the pump casing fill cover or fill plug in the top of the casing,
and add clean liquid until the casing is filled. Replace the fill cover or fill plug before
operatingthepump.

LineswithaBypass
If an AutomaticAir Release Valve has been installed, the valve will automatically open
to allow the pump to prime, and automatically close after priming is complete (see
INSTALLATIONforAirReleaseValveoperation.
Lines without a Bypass
Openallvalvesinthedischargelineandstartthepowersource.Primingisindicatedby
a positive reading on the discharge pressure gauge or by a quieter operation. The
pumpmaynotprimeimmediatelybecausethesuctionlinemustfirstfillwithliquid.Ifthe
pumpfailstoprimewithinfiveminutes,stopitandcheckthesuctionlineforleaks.
After the pump has been primed, partially close the discharge line throttling valve in
order to fill the line slowly and guard against excessive shock pressure which could
damage pipe ends, gaskets, sprinkler heads, and any other fixtures connected to the
line. When the discharge line is completely filled, adjust the throttling valve to the
requiredflowrate.
15
10. OPERATION
9. STARTING
Consulttheoperationsmanualfurnishedwiththepowersource.
Rotation
The correct direction of pump rotation is counterclockwise when facing the impeller.
The pump could be damaged and performance adversely affected by incorrect
rotation. If pump performance is not within the specified limits (see the curve on page
20),checkthedirectionofpowersourcerotationbeforefurthertroubleshooting(figure9).
If an electric motor is used to drive the pump, remove V-belts, couplings, or otherwise
disconnectthepumpfromthemotorbeforecheckingmotorrotation.Operatethemotor
independentlywhileobservingthedirectionofthemotorshaft,orcoolingfan.
If rotation is incorrect on a three-phase motor, have a qualified electrician interchange
any of the phase wires to change direction. If rotation is incorrect on a single-phase
motor,consulttheliteraturesuppliedwiththemotorforspecificinstructions.
Do not operate the pump against a closed discharge throttling valve
for long periods of time. If operated against a closed discharge
throttling valve, pump components will deteriorate, and the liquid
could come to a boil, build pressure, and cause the pump casing to
ruptureorexplode.
WARNING!
Leakage
No leakage should be visible at pump mating surfaces, or at pump connections or
fittings. Keep all line connections and fittings tight to maintain maximum pump
efficiency.

16
LiquidTemperatureandOverheating
The maximum liquid temperature for this pump is 71º C. Do not apply it at a higher
operatingtemperature.
Overheating can occur if operated with the valves in the suction or discharge lines
closed. Operating against closed valves could bring the liquid to a boil, build pressure,
and cause the pump to rupture or explode. If overheating occurs, stop the pump and
allowittocoolbeforeservicingit.Refillthepumpcasingwithcoolliquid.
Allow an over-heated pump to cool before servicing. Do not remove
plates, covers, gauges, or fittings from an overheated pump. Liquid
within the pump can reach boiling temperatures, and vapour
pressure within the pump can cause parts being disengaged to be
ejected, with great force. After the pump cools, drain the liquid from
the pump by removing the casing drain plug. Use caution when
removingtheplugtopreventinjurytopersonnelfromhotliquid.
DANGER!
As safeguard against rupture or explosion due to heat, this pump is equipped with a
pressurereliefvalvewhichwillopenifvapourpressurewithinthepumpcasingreaches
a critical point. If overheating does occur, stop the pump immediately and allow it to
coolbefore servicingit.Approachanyoverheatedpumpcautiously.Itisrecommended
that the pressure relief valve assembly be replaced at each overhaul, or any time the
pump casing overheats and activates the valve. Never replace this valve with a
substitutewhichhasnotbeenspecifiedorprovidedbyRemko.
StrainerCheck
Ifasuctionstrainerhasbeenshippedwiththepumporinstalledbytheuser, check the
strainer regularly, and clean it as necessary. The strainer should also be checked if
pump flow rate begins to drop. If a vacuum suction gauge has been installed, monitor
andrecordthereadingsregularlytodetectstrainerblockage.
Never introduce air or steam pressure into the pump casing or piping to remove a
blockage. This could result in personal injury or damage to the equipment. If back
flushing is absolutely necessary, liquid pressure must be limited to 50% of the
maximumpermissibleoperatingpressureshowonthepumpperformancecurve.
Pump Vacuum Check
With the pump inoperative, install a vacuum gauge in the system, using pipe dope on
the threads. Block the suction line and start the pump. At operating speed the pump
shouldpullavacuumof508mm or more of mercury. If itdoesnot,checkforair leaks in
theseal,gasket,ordischargevalve.
Open the suction line, and read the vacuum gauge with the pump primed and at
operation speed. Shut off the pump.The vacuum gauge reading will immediately drop
proportionatetostaticsuction lift,andshouldthenstabilize. If thevacuumreadingfalls
off rapidly after stabilization, an air leak exists. Before checking for the source of the
leak,checkthepointofinstallationofthevacuumgauge.

12. BEARING TEMPERATURE CHECK
Bearingsnormallyrunathigherthanambienttemperaturesbecauseofheatgenerated
byfriction.Temperaturesupto 71ºCareconsidered normalforbearings,and theycan
operatesafelytoatleast82ºC.
Checking bearing temperatures by hand is inaccurate. Bearing temperatures can be
measured accurately by placing a contact-type thermometer against the housing.
Recordthistemperatureforfuturereference.
A sudden increase in bearing temperature is a warning that the bearings are at the
point of failing to operate properly. Make certain that the bearing lubricant is of the
proper viscosity and at the correct level (see LUBRICATION in MAINTENANCEAND
REPAIR).
Bearing overheating can also be caused by shaft misalignment and/or excessive
vibration.
When pumps are first started, the bearings may seem to run at temperatures above
normal.Continuedoperationshouldbringthetemperaturesdowntonormallevels. 17
11. STOPPING
Never halt the flow of liquid suddenly. If the liquid being pumped is stopped abruptly,
damaging shock waves can be transmitted to the pump and piping system. Close
all connecting valves slowly.
On engine driven pumps, reduce the throttle speed slowly and allow the engine to idle
brieflybeforestopping.
If the application involves a high discharge head, gradually close the
dischargethrottlingvalvebeforestoppingthepump.
CAUTION!
Do not operate the pump against a closed discharge throttling valve
for long periods of time. If operated against a closed discharge
throttling valve, pump components will deteriorate, and the liquid
could come to a boil, build pressure, and cause the pump casing to
ruptureorexplode.
WARNING!
After stopping the pump, lock out or disconnect the power source to ensure that the
pumpwillremaininoperative.
ColdWeatherPreservation
In below freezing conditions, drain the pump to prevent damage from freezing. Also,
clean out any solids by flushing with a hose. Operate the pump for approximately one
minute;thiswillremoveanyremainingliquid that could freeze the pumprotatingparts.
If the pump will be idle for more than a few hours, or if it has been pumping liquids
containing a large amount of solids, drain the pump, and flush it thoroughly with clean
water. To prevent large solids from clogging the drain port and preventing the pump
fromcompletely draining,insertarodorstiff wireinthedrainport,andagitatetheliquid
duringthedrainingprocess.Cleanoutanyremainingsolidsbyflushingwithahose.

SECTION D - TROUBLESHOOTING
Review all SAFETY information in Section A.
18
Beforeattemptingtoopenorservicethepump:
1. Familiarizeyourselfwiththismanual.
2. Lock out or disconnect the power source to ensure that the
pumpwillremaininoperative.
3. Allowthepumptocoolifoverheated.
4. Check the temperature before opening any covers, plates, or
plugs.
5. Closethesuctionanddischargevalves.
6. Ventthepumpslowlyandcautiously.
7. Drainthepump.
WARNING!
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP FAILS
TO PRIME Not enough liquid in casing.
Suction check valve contaminated or
damaged.
Air leak in suction line.
Lining of suction hose collapsed.
Leaking or worn seal or pump gasket.
Suction lift or discharge head too high.
Strainer clogged.
Add liquid to casing. See PRIMING.
Clean or replace check valve.
Correct leak.
Replace suction hose.
Check pump vacuum. Replace leaking
or worn seal or gasket.
Check piping installation and install
bypass line if needed.
See INSTALLATION.
Check strainer and clean if necessary.
EXCESSIVE
NOISE Cavitation in pump.
Pumping entrained air.
Pump or drive not securely mounted.
Impeller clogged or damaged.
Bearing temperature is high, but within
limits.
Low or incorrect lubricant.
Suction and discharge lines not properly
supported.
Drive misaligned.
Reduce suction lift and/or friction losses
in suction line. Record vacuum and
pressure gauge readings and consult
local representative or factory.
Locateand eliminate sourceofairbubble.
Secure mounting hardware.
Clean out debris; replace damaged parts.
Check bearing temperature regularly to
monitor any increase.
Check for proper type and level of
lubricant.
Check piping installation for proper
support.
Align drive properly.
BEARINGS
RUN TOOHOT

19
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMPSTOPS
ORFAILSTO
DELIVER
RATEDFLOW
ORPRESSURE
Air leak in suction line.
Lining of suction hose collapsed.
Leaking or worn seal or pump gasket.
Strainer clogged.
Suction intake not submerged at
proper level or sump too small.
Impeller or other wearing parts worn
or damaged.
Impeller clogged.
Pump speed too slow.
Discharge head too high.
Suction lift too high.
Pump speed too high
Discharge head too low.
Liquid solution too thick.
Bearing(s) frozen.
Liquid solution too thick.
Discharge flow too slow.
Suction check valve or foot valve
clogged or binding.
Correct leak.
Replace suction hose.
Check pump vacuum. Replace leaking
or worn seal or gasket.
Check strainer and clean if necessary.
Check installation and correct sub-
mergence as needed.
Replace worn or damaged parts. Check
that impeller is properly centred and
rotates.
Free impeller of debris.
Check driver output; check belts or
couplings for slippage.
Install bypass line.
Measure lift with vacuum gauge. Reduce
lift and/or friction losses in suction line.
Check driver output; check that sheaves
or motor rpm are correctly sized.
Adjust discharge valve.
Dilute if possible.
Disassemble pump and check bearing(s).
Dilute if possible.
Open discharge valve fully to increase
flow rate, and run power source at
maximum governed speed.
Clean valve.
PUMP
REQUIRES
TOO MUCH
POWER
PUMP CLOGS
FREQUENTLY